Combined sample tube, screw cap and marking plug



FIG. 1 is an exploded perspective view of the combined sample tube,screw cap and marking plug showing my new design;

FIG. 2 is an elevational side view thereof in an assembled state, theopposite elevational side view being identical;

FIG. 3 is a cross-sectional view therethrough as seen along line 3--3 inFIG. 5;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof.

The ornamental design for a combined sample tube, screw cap and markingplug, as shown and described.